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    Site-to-Site OpenVPN Connectivity Problem

    Scheduled Pinned Locked Moved OpenVPN
    28 Posts 3 Posters 2.6k Views
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    • DerelictD
      Derelict LAYER 8 Netgate
      last edited by

      That is not enough information to provide any help.

      Post a pcap of something like a ping -c3 dest at each hop, detailing exactly where each pcap is taken.

      Chattanooga, Tennessee, USA
      A comprehensive network diagram is worth 10,000 words and 15 conference calls.
      DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
      Do Not Chat For Help! NO_WAN_EGRESS(TM)

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      • J
        JamesVA
        last edited by

        Sorry for the delay in my response - was out of office. Please let me know if you need more info, or if i misunderstood anything.

        clientA > pfsenseB (ping -c 1 10.0.105.51)

        clientA:

        C:\WINDOWS\system32>ping -c 1 10.0.105.1

        Pinging 10.0.105.1 with 32 bytes of data:
        Request timed out.
        Request timed out.
        Request timed out.
        Request timed out.

        Ping statistics for 10.0.105.1:
        Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

        C:\WINDOWS\system32>

        pfsenseA:
        tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
        listening on ovpns2, link-type NULL (BSD loopback), capture size 262144 bytes
        14:17:33.076313 IP 10.0.100.121 > 10.0.105.1: ICMP echo request, id 1, seq 779, length 40
        14:17:37.670815 IP 10.0.100.121 > 10.0.105.1: ICMP echo request, id 1, seq 780, length 40
        14:17:42.681825 IP 10.0.100.121 > 10.0.105.1: ICMP echo request, id 1, seq 781, length 40
        14:17:47.687779 IP 10.0.100.121 > 10.0.105.1: ICMP echo request, id 1, seq 782, length 40

        pfsenseB:
        tcpdump is empty

        clientA > clientB (ping -c 1 10.0.105.51)

        ClientA:
        C:\WINDOWS\system32>ping -c 1 10.0.105.51

        Pinging 10.0.105.51 with 32 bytes of data:
        Request timed out.
        Request timed out.
        Request timed out.
        Request timed out.

        Ping statistics for 10.0.105.51:
        Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

        C:\WINDOWS\system32>

        pfsenseA:
        tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
        listening on ovpns2, link-type NULL (BSD loopback), capture size 262144 bytes
        14:21:43.005849 IP 10.0.100.121 > 10.0.105.51: ICMP echo request, id 1, seq 787, length 40
        14:21:47.666048 IP 10.0.100.121 > 10.0.105.51: ICMP echo request, id 1, seq 788, length 40
        14:21:52.670818 IP 10.0.100.121 > 10.0.105.51: ICMP echo request, id 1, seq 789, length 40
        14:21:57.685270 IP 10.0.100.121 > 10.0.105.51: ICMP echo request, id 1, seq 790, length 40

        pfsenseB:
        tcpdump is empty.

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        • DerelictD
          Derelict LAYER 8 Netgate
          last edited by

          @jamesva said in Site-to-Site OpenVPN Connectivity Problem:

          pfsenseB:
          tcpdump is empty.

          Listening where?

          Sorry. You don't need the -c 1 flag. I forget sometimes that some people still use Windows.

          Don't need any more ping results. We know it isn't working.

          Chattanooga, Tennessee, USA
          A comprehensive network diagram is worth 10,000 words and 15 conference calls.
          DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
          Do Not Chat For Help! NO_WAN_EGRESS(TM)

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          • J
            JamesVA
            last edited by

            pfsenseB is the other side psfsense console.

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            • DerelictD
              Derelict LAYER 8 Netgate
              last edited by Derelict

              Right but capturing on what interface? Need specifics here.

              And can you ping the pfSense LAN interface address on the other side?

              Chattanooga, Tennessee, USA
              A comprehensive network diagram is worth 10,000 words and 15 conference calls.
              DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
              Do Not Chat For Help! NO_WAN_EGRESS(TM)

              1 Reply Last reply Reply Quote 0
              • J
                JamesVA
                last edited by

                The captures are running on the ovpn interfaces. Should i have been capturing on another interface?

                As far as ping LAN interface - no, i can't reach it from one side to another. However if the client is on the same side, pfsense's LAN int responds to pings just fine.

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                • J
                  JamesVA
                  last edited by JamesVA

                  Having said that, it looks like I can ping clients on Side A if i'm sitting on the console of pfsenseB.....

                  however it doesn't work the opposite way, i.e. if i'm on the console of pfsenseA, i can't reach anything on side B.

                  1 Reply Last reply Reply Quote 0
                  • DerelictD
                    Derelict LAYER 8 Netgate
                    last edited by

                    It doesn't make any sense that you are seeing traffic exit the VPN at A but it does not arrive in a capture on openvpn at B.

                    Chattanooga, Tennessee, USA
                    A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                    DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                    Do Not Chat For Help! NO_WAN_EGRESS(TM)

                    1 Reply Last reply Reply Quote 0
                    • J
                      JamesVA
                      last edited by

                      Could it have something to do with the fact that pfsenseB WAN IP is on 10.x.x.x subnet?

                      1 Reply Last reply Reply Quote 0
                      • DerelictD
                        Derelict LAYER 8 Netgate
                        last edited by

                        Not unless it's within or conflicting somehow eith the others. And you'd still see the packets in the capture on the OpenVPN.

                        Chattanooga, Tennessee, USA
                        A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                        DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                        Do Not Chat For Help! NO_WAN_EGRESS(TM)

                        1 Reply Last reply Reply Quote 0
                        • J
                          JamesVA
                          last edited by

                          hmm ok, what else can you suggest I try? I do have multiple ovpn instances on SideA, but i can't imagine that would conflict with any of them since they're running on different ports....

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                          • DerelictD
                            Derelict LAYER 8 Netgate
                            last edited by

                            It's not about ports but addresses/networks. They all need to be unique.

                            Chattanooga, Tennessee, USA
                            A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                            DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                            Do Not Chat For Help! NO_WAN_EGRESS(TM)

                            1 Reply Last reply Reply Quote 0
                            • J
                              JamesVA
                              last edited by

                              they are; screenshot below.

                              0_1539288653531_2018-10-11_15-09-37.jpg

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                              • J
                                JamesVA
                                last edited by

                                what would be the next think i try that you would suggest?

                                1 Reply Last reply Reply Quote 0
                                • DerelictD
                                  Derelict LAYER 8 Netgate
                                  last edited by

                                  Don't know. I asked for some files in chat. Did you upload those?

                                  Chattanooga, Tennessee, USA
                                  A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                                  DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                                  Do Not Chat For Help! NO_WAN_EGRESS(TM)

                                  1 Reply Last reply Reply Quote 0
                                  • J
                                    JamesVA
                                    last edited by

                                    Done. Thanks for taking a look at it!

                                    1 Reply Last reply Reply Quote 0
                                    • J
                                      JamesVA
                                      last edited by

                                      Just wanted to check in if you had to review the files i sent over.

                                      Thanks in advance!

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                                      • J
                                        JamesVA
                                        last edited by JamesVA

                                        guess not, no problem. thanks for giving it a shot, i do appreciate it.

                                        Just as an update... I thought... well maybe it's one of the packages that's interfering with the traffic... so I've set up a completely vanilla lab on the vmware workstation. The only package loaded on both sides is open-vm-tools....

                                        Same exact results.... so it makes me think i'm doing something wrong. I'll keep picking at it....

                                        Any other suggestions are welcome.

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                                        • J
                                          JamesVA
                                          last edited by

                                          I kind of gave up on the openvpn and went with IPsec... seemed to work as expected on the first try.

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